微弯河道河床及河岸压强分布特性研究

为揭示微弯河岸形态下河床及河岸沿线压强的分布规律,利用FLUENT模拟研究了顺直河道衔接正弦形河道的模型在不同河道水流流速条件下河床界面与河岸沿线压强的分布特性。结果表明,河床界面的沿线压强受曲边形态的影响呈一定的波动特性,且这种波动特性会随流速增大而增强;河岸不同分层的沿线压强呈相似的波动特性,具体表现为河道凸岸段为水力低压区,凹岸段为水力高压区,且上层波动性更强;当河道水流流速增大时,河岸沿线总压强的波动振幅也随之增大。

Investigation on Pressure Distribution of Riverbed and Riverbanks along Bending Riverbanks

In order to reveal the pressure distribution of riverbed and riverbanks along bending riverbanks, FLUENT software was used to simulate the pressure distribution along riverbed and riverbanks under different velocities for the model of straight channel connecting the riverbed. The results show that the pressure distribution along riverbed appears a certain degree of fluctuation characteristics under the influence of curved riverbank, and these fluctuation characteristics are enhanced with increasing flow velocity; the pressure distribution along the riverbank in different levels shows similar fluctuation characteristics and the upper layer fluctuates more strongly, the convex location of riverbanks is the low pressure area and the concave is the high pressure area; the fluctuation amplitude along the riverbanks of the total pressure increases with flow rates.